单项选择题
A.up B.down C.through D.over
It was well known that Thomas Edison（）the electric lamp...
单项选择题It was well known that Thomas Edison（）the electric lamp.
A.invented B.discovered C.found D.developed
After stopping for a few minutes, the bus moved（）to its...
单项选择题After stopping for a few minutes, the bus moved（）to its next stop.
A.forward B.off C.with D.on
The teacher spoke so fast that it was hard for the stud...
单项选择题The teacher spoke so fast that it was hard for the students to（）what he was saying.
A.take in B.take out C.take up D.take over
